Preheat your oven to 350°F (175°C) and grease two cake pans.
Add and combine the flour, sugar, baking powder, and salt in a mixing bowl. Incorporate the softened butter and blend until the mixture has a coarse crumb-like texture.
Pour in the milk and vanilla extract, and beat with an electric mixer or whisk until the batter is smooth.
Add the eggs to the mixture one at a time, beating thoroughly after each addition.
Divide the batter evenly among the prepared cake pans and use a spatula to smooth the tops for a level surface.
Bake in the preheated oven for about 25-30 minutes or until a toothpick inserted into the center comes out clean.
Cool cakes for 10 minutes after removing from the oven. After that put them on a cooling rack to cool completely.
Meanwhile, in a chilled mixing bowl, whip the heavy cream, powdered sugar, and vanilla extract until stiff peaks form.
Put one cake layer on a serving cake stand or platter. Spread a generous amount of whipped cream over the top and layer with sliced strawberries.
Place the second cake layer on top and repeat the process, finishing with a layer of whipped cream and strawberries.
Refrigerate the strawberry shortcake for at least 1 hour before serving to allow the flavors to meld together.
Slice and serve the Sara Lee Strawberry Shortcake to the delight of your family and friends.